Class Presentation:

Essential Biology: E1 Stimulus and Response

……….o0O0o……..

For Reflex Arcs (including the pain reflex):

Start with:

• This clear animated tutorial from Freeman LifeWire.
• and this tutorial from Sumanas
• Stimulus of a nociceptor (pain receptor) from University of Edinburgh Vet Dept.

And see if you can explain this animation from the University of Minnesota

A more basic overview (not explanation) is on BBC BiteSize.

Lots more CNS animations from North Harris College

………o0O0o………

Some good readers from Not Exactly Rocket Science for the effect of natural selection on response to stimulus:

• Bird feeders separate populations of Blackcaps
• Ecuador butterflies show divergence in mate selection